<template>
  <!-- 登录页面的整体盒子 -->
  <div class="login-container">
    <!-- 登录的盒子 -->
    <div class="login-box">
      <!-- 标题的盒子 -->
      <div class="title-box"></div>
      <!-- 登录的表单区域 -->
      <el-form :model="loginForm" :rules="loginRules" ref="loginRef">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" placeholder="请输入用户名" maxlength="10" minlength="1" prefix-icon="el-icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <!-- el-input是组件，不是标签 ，直接绑事件会绑在真正 input 标签外的div 身上-->
        <!-- native 作用 将事件 绑到真正的 input 标签上 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
           show-password
            prefix-icon="el-icon-lock"
            placeholder="请输入密码"
            maxlength="15"
            minlength="6"
            @keydown.enter.native="loginUser"
          ></el-input>
        </el-form-item>
        <el-form-item>
          <el-button type="primary" class="btn-login" @click="loginUser">登录</el-button>
          <el-link type="primary" @click="$router.push('/reg')" >去注册</el-link>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: 'Login',
 data(){
  return {
     loginForm:{
        username:'',
        password:'',
      },
      loginRules:{
        username:[
           { required: true, message: '请输入用户名', trigger: 'blur' },
          //  {pattern:/^[a-zA-z][a-zA-Z0-9]{1,9}$/,message:'首位必须为英文字母其他为字母数字，长度为1~10位',trigger:'blur'}
           {pattern:/^[a-zA-Z0-9]{1,10}$/,message:'必须为英文字母,数字，长度为1~10位',trigger:'blur'}
        ],
        password:[
          { required: true, message: '请输入密码', trigger: 'blur' },
           {pattern:/^\S{6,15}$/,message:'密码必须是6-15的非空字符',trigger:'blur'}
        ]
      }
  }
 },
 methods:{
  loginUser(){
    this.$refs.loginRef.validate(async valid=>{
      // console.log(valid)
      if(!valid) return
     const {data:res}= await this.$http.post('/api/login',this.loginForm)
        if(res.code!=0) return this.$message.error(res.message)
          this.$message.success(res.message)
          this.$store.commit('updateToken',res.token)

          this.$router.push('/')
    })
  }
 }
}
</script>

<style lang="less" scoped>
.login-container {
  background: url('../../assets/images/login_bg.jpg') center;
  background-size: cover;
  height: 100%;

  .login-box {
    width: 400px;
    height: 270px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    padding: 0 30px;
    box-sizing: border-box;

    .title-box {
      height: 60px;
      background: url('../../assets/images/login_title.png') center no-repeat;
    }

    .btn-login {
      width: 100%;
    }
  }
}
</style>
